sangkukbae12

function test() {
  const data = [
    ['오백삼십조칠천팔백구십만천오백삼십구', '삼조사천이만삼천구'],
    ['육십사억삼천십팔만칠천육백구', '사십삼'],
    ['구백육십조칠천억팔천백삼십이만칠천일', '사십삼조오천이백억육천구백십만일'],
    ['이천구백육십조천오백칠십만삼천구백구십', '삼천사백오십조일억이천만육백사십삼'],
    ['사십오억삼천육십만오백구십', '칠십억천이백삼십오만칠천구십이'],
    ['천백십일', '구천오백구십구'],
    ['오억사천', '백십일'],
    ['만오천사백삼십', '십구만삼천오백'],

sangkukbae12

const args = process.argv.slice(2);

sumTwoNum(args[0], args[1])

function sumTwoNum(str1, str2) {
  if (str1.length > str2.length) {
    [str1, str2] = [str2, str1]
  } 

  let str = ""

sangkukbae12

// HOCs
function WithCount(Component) {
  return class withCount extends React.Components {
    state = { count: 0 }
    increment = () => {
      this.setState((state) => ({ count: state.count + 1 }))
    }
    decrement = () => {
      this.setState((state) => ({ count: state.count - 1 }))
    }

sangkukbae12

import React from 'react'
const CountStateContext = React.createContext()
const CountDispatchContext = React.createContext()
function countReducer(state, action) {
  switch (action.type) {
    case 'increment': {
      return {count: state.count + 1}
    }
    case 'decrement': {
      return {count: state.count - 1}

sangkukbae12

// 1. find
const users = [
  { 'user': 'joey',  'age': 32 },
  { 'user': 'ross',    'age': 41 },
  { 'user': 'chandler', 'age': 39 }
]

// Native
users.find(function (o) { return o.age < 40; })

sangkukbae12

// 1. Use the Default Iterator from an Array
const abcs = ["A", "B", "C"]

const createIterator = abcs[Symbol.iterator].bind(abcs)

const iterator = createIterator()

for (const i of iterator) {
    console.log(i)
}

sangkukbae12

// 1. Transform an Array into a Single Value using Reduce
var data = [15, 3, 20];

var reducer = function(accumulator, item) {
  return accumulator + item;
};

var initialValue = 0;

var total = data.reduce(reducer, initialValue);

sangkukbae12

// 1. Use Concat to Add Values to an Array
// Array.prototype.concat();
var people = [
  {
    name: 'Shane'
  },
  {
    name: 'Sally'
  }
];

sangkukbae12

// 1. Create a Promise Chain in JavaScript with Promise.prototype.then()
const API_URL = "https://starwars.egghead.training/";
const output = document.getElementById("output");

function getFilmTitles(films) {
  return films
    .slice()
    .sort((a, b) => a.episode_id - b.episode_id)
    .map(film => `${film.episode_id}. ${film.title}`)
    .join("\n");

sangkukbae12

// 1. Use JavaScript (ES6) generators to pause function execution
function* createLogger() {
	console.log('Start')
	yield
	console.log('Second block')
	yield
	console.log('Third block')
	yield
	console.log('End')
}